This summer, Thwaites Glacier in Antarctica was visibly melting, almost like it was crying. Dr. Yixi Zheng, a climate scientist from the British Antarctic Survey, was aboard the South Korean icebreaker Araon when she saw the massive 40-meter-tall ice shelf. “It’s like a ten-floor building in front of you, and the water is dripping fast—between dripping and a waterfall,” she described.
Standing on the ice shelf, the team noticed a shimmering effect on the sea surface. The shimmering was from meltwater, which collects under the ice shelf. Zheng explained that despite being deep underwater, the meltwater bubbles up, creating a visible shimmer, almost making the ice shelf look like it was shivering.
To study the glacier closely, they camped on the ice shelf for twelve days. However, due to heavy crevasses and cracks, they couldn’t use a fixed-wing plane as planned and had to rely on a helicopter instead. While camped 30 kilometers from the open ocean, researchers found that the water temperature beneath the ice was 1.1 degrees Celsius, around 3 degrees above freezing.
The Korea Polar Research Institute conducted radar surveys revealing that the ice shelf is thinning at alarming rates—between 40 to 140 meters a year. Reports show that Thwaites contains enough water to raise global sea levels by 60 to 65 centimeters. Although other glaciers could cause more dramatic rises if they melted completely, Thwaites is particularly worrisome because it is melting rapidly.
Dr. Edward Doddridge from the Institute for Marine and Antarctic Studies (IMAS) stated, “There’s mounting evidence that we have already reached the point at which they cannot be saved.” He added that while reducing carbon emissions could slow the melting, we are already facing critical consequences.
The larger picture is even more daunting. East Antarctica holds 52 meters of potential sea level rise, and scientists worry about the long-term impacts of its stability. Dr. Linda Armbrecht led an expedition to the Cook Glacier, focusing on its vulnerable regions. Researchers aim to understand the history of ice and its changes to predict future challenges.
These melting patterns have far-reaching effects beyond mere sea level changes. They disrupt global ocean currents crucial for regulating climate. The Atlantic Meridional Overturning Circulation (AMOC) has already weakened. If it collapses, it could lead to drastic climate shifts affecting agriculture and living conditions across various regions.
One recent study indicates temperatures could shift as much as 7 degrees in specific areas if the AMOC fails. The systems at play are delicate and interconnected, impacting everything from weather patterns to ecological stability.
As scientists grapple with these findings, there’s a palpable sense of urgency. “You see it melting fast, breaking up fast, and we need to do something,” Zheng concluded.
To keep informed about climate change effects and environmental issues, you can explore more at the Korea Polar Research Institute.
